Entropy analysis and improved formulation of electron kinetic theory approach for laser short-pulse heating

Bekir Sami Yilbas

doi:10.1080/1040779049025486

Entropy analysis and improved formulation of electron kinetic theory approach for laser short-pulse heating

Bekir Sami Yilbas^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Laser short-pulse heating of metallic substrates triggers nonequilibrium energy transport in the region irradiated by a laser beam. Entropy analysis gives information on the energy transport process during the laser short-pulse heating process. In the present study, formulation of entropy production in the electron and lattice subsystems as well as their coupling through thermal communication of these subsystems is carried out. The ballistic behavior of the excited electrons in the electron subsystem is also considered. The temperature fields obtained from previously developed and improved electron kinetic theory approaches and two-equation models are compared. It is found that entropy production during thermal communication of electron and lattice subsystems is higher than those corresponding to electron and lattice subsystems.

Original language	English
Pages (from-to)	75-98
Number of pages	24
Journal	Numerical Heat Transfer, Part B: Fundamentals
Volume	45
Issue number	1
DOIs	https://doi.org/10.1080/1040779049025486
State	Published - Jan 2004

Bibliographical note

Funding Information:
Received 25 April 2003; accepted 5 June 2003. The author acknowledges the support of King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia, for this work. Address correspondence to Bekir Sami Yilbas, King Fahd University of Petroleum and Minerals, Department of Mechanical Engineering, KFUPM, P.O. Box 1913, Dhahran 31261, Saudi Arabia. E-mail: [email protected]

ASJC Scopus subject areas

Numerical Analysis
Modeling and Simulation
Condensed Matter Physics
Mechanics of Materials
Computer Science Applications

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title = "Entropy analysis and improved formulation of electron kinetic theory approach for laser short-pulse heating",

abstract = "Laser short-pulse heating of metallic substrates triggers nonequilibrium energy transport in the region irradiated by a laser beam. Entropy analysis gives information on the energy transport process during the laser short-pulse heating process. In the present study, formulation of entropy production in the electron and lattice subsystems as well as their coupling through thermal communication of these subsystems is carried out. The ballistic behavior of the excited electrons in the electron subsystem is also considered. The temperature fields obtained from previously developed and improved electron kinetic theory approaches and two-equation models are compared. It is found that entropy production during thermal communication of electron and lattice subsystems is higher than those corresponding to electron and lattice subsystems.",

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note = "Funding Information: Received 25 April 2003; accepted 5 June 2003. The author acknowledges the support of King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia, for this work. Address correspondence to Bekir Sami Yilbas, King Fahd University of Petroleum and Minerals, Department of Mechanical Engineering, KFUPM, P.O. Box 1913, Dhahran 31261, Saudi Arabia. E-mail: [email protected]",

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AB - Laser short-pulse heating of metallic substrates triggers nonequilibrium energy transport in the region irradiated by a laser beam. Entropy analysis gives information on the energy transport process during the laser short-pulse heating process. In the present study, formulation of entropy production in the electron and lattice subsystems as well as their coupling through thermal communication of these subsystems is carried out. The ballistic behavior of the excited electrons in the electron subsystem is also considered. The temperature fields obtained from previously developed and improved electron kinetic theory approaches and two-equation models are compared. It is found that entropy production during thermal communication of electron and lattice subsystems is higher than those corresponding to electron and lattice subsystems.

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Entropy analysis and improved formulation of electron kinetic theory approach for laser short-pulse heating

Abstract

Bibliographical note

ASJC Scopus subject areas

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